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Finding the Fourth Proportional to 10,015, 13,820.72 and 5,599

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Solution

The fourth proportional to 10,015, 13,820.72 and 5,599 is: 7,726.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,015 : 13,820.72 = 5,599 : x
  2. Step 2: Convert to fraction form
    10,015/13,820.72 = 5,599/x
  3. Step 3: Cross multiply
    10,015x = 13,820.72 × 5,599
  4. Step 4: Simplify right side
    10,015x = 77,382,211.28
  5. Step 5: Solve for x
    x = 77,382,211.28/10,015
  6. Step 6: Final answer
    x = 7,726.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.